Analog Devices Inc. LTC2323IUFD-12#PBF

Overview

LTC2323IUFD-12#PBF from Analog Devices is a dual-channel, 12-bit + sign successive approximation register (SAR) analog-to-digital converter with differential inputs, 5 Msps throughput per channel, ±0.5 LSB typical INL, and 73 dB SNR at 2 MHz input - designed for high-speed data acquisition in industrial control and optical networking systems.

For engineers reviewing the LTC2323IUFD-12#PBF datasheet, LTC2323IUFD-12#PBF pinout, LTC2323IUFD-12#PBF application, or LTC2323IUFD-12#PBF equivalent, this device supports CMOS/LVDS serial interface, internal 4.096 V reference with 20 ppm/°C drift, wide common-mode input range (0 V to VDD), and operation up to 125°C - critical for precision timing-critical signal capture in multiphase motor control and remote sensing.

Technical Context

The LTC2323IUFD-12#PBF implements a dual SAR architecture with independent sample-and-hold circuits per channel, enabling simultaneous sampling and one-cycle latency conversion. Its differential input stage accepts ±4.096 V full-scale range (8 V_P-P) while maintaining 85 dB CMRR at 2.2 MHz.

It integrates two temperature-compensated reference buffers (REFOUT1/REFOUT2), configurable via REFINT pin, and supports flexible I/O voltage (1.8 V–2.5 V) with selectable CMOS or LVDS serial output using SDO1+/SDO1– and CLKOUT+/CLKOUT– pairs - all synchronized to external SCK with skew-matched clock delivery.

Key Specifications

Pinout & Package

Package: 28-lead (4 mm × 5 mm) QFN with exposed pad (Pin 29), RoHS-compliant, moisture sensitivity level 3.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel, high-speed SAR ADC applications.

Compared with AD7960BCPZ-RL7 and LTC2325CUFD-16#PBF, the LTC2323IUFD-12#PBF uniquely delivers dual-channel 5 Msps operation with integrated reference and flexible I/O in a compact QFN - optimizing for cost, size, and synchronization in real-time embedded control systems.

Availability

LTC2323IUFD-12#PBF is available at Aetrix Electronics and suitable for high-speed data acquisition systems, optical networking modules, and multiphase motor control applications requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.

Supply support for LTC2323IUFD-12#PBF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.

The LTC2323IUFD-12#PBF belongs to the LTC23xx family of high-speed SAR ADCs engineered for precision, low-latency digitization in thermally demanding environments - emphasizing robustness, integrated references, and flexible interface options for embedded signal chain design.

FAQ

What is the maximum operating temperature for the LTC2323IUFD-12#PBF?

The LTC2323IUFD-12#PBF is rated for operation from –40°C to +125°C (H-grade), making it suitable for under-hood automotive, industrial motor drives, and base station equipment where ambient temperatures exceed 85°C. This rating is guaranteed across all electrical specifications including INL, SNR, and reference stability.

Does the LTC2323IUFD-12#PBF support external reference inputs?

Yes, the LTC2323IUFD-12#PBF supports external references via REFOUT1 and REFOUT2 pins. When REFINT is grounded, the internal reference buffers are disabled, allowing external sources (1.25 V to VDD) to drive these pins directly. The device maintains full specification compliance with external references, including dynamic performance and linearity.

How does the CMOS/LVDS pin affect interface configuration on the LTC2323IUFD-12#PBF?

The CMOS/LVDS pin on the LTC2323IUFD-12#PBF selects the serial interface standard: grounded for CMOS (single-ended SDO/CLKOUT), tied to OVDD for LVDS (differential SDO/CLKOUT), or left floating for low-power LVDS. This setting determines driver strength, termination requirements, and voltage swing - no register writes or firmware changes are needed.

Can the LTC2323IUFD-12#PBF perform simultaneous sampling on both channels?

Yes, the LTC2323IUFD-12#PBF features two independent sample-and-hold circuits and SAR cores that operate synchronously from a shared CNV signal, enabling true simultaneous sampling with aperture delay matching of <500 ps. This ensures phase coherence critical for I/Q demodulation and motor current vector calculation.

What is the purpose of the REFRTN1 and REFRTN2 pins on the LTC2323IUFD-12#PBF?

REFRTN1 and REFRTN2 are dedicated return paths for the internal reference buffers driving REFOUT1 and REFOUT2. They must be bypassed directly to their respective REFOUT pins using 0.1 µF + 10 µF capacitors - not connected to system ground. This Kelvin connection preserves reference accuracy by eliminating IR drop and noise coupling in the reference return path.